xenotime composition
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Bastnäsite
Bastnäsite is closely related to the mineral series parisite The two are both rare-earth fluorocarbonates, but parisite's formula of Ca(Ce, La, Nd) 2 (CO 3) 3 F 2 contains calcium (and a small amount of neodymium) and a different ratio of constituent ionsParisite could be viewed as a formula unit of calcite (CaCO 3) added to two formula units of bastnäsite...
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Understanding geologic processes with xenotime ,
Sep 15, 2008· Read "Understanding geologic processes with xenotime: Composition, chronology, and a protocol for electron probe microanalysis, Chemical Geology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips...
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Paragenesis and composition of xenotime
Jun 25, 2019· The high U content of xenotime-(Y) and composition of early florencite-(Ce) potentially support a genetic association between the HREE mineralization and the coeval unconformity-related U deposits of northern Australia Nevertheless, we also urge for caution in using xenotime-(Y) composition in isolation as an indicator of geological setting...
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THE MINERAL MONAZITE
The differences in the formula represent the greater percentages of certain elements in the mineral The first element listed in the parenthesis is the element with the greater percentage in the mineral; so that monazite-(La) is greatly enriched in lanthanum, etc Monazite-(Ce) is not only enriched in cerium it is also by far the most common of the three and is probably the actual mineral when ....
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Paragenesis and composition of xenotime
The high U content of xenotime-(Y) and composition of early florencite-(Ce) potentially support a genetic association between the HREE mineralization and the coeval unconformity-related U deposits ....
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Composition of xenotime
The high U content of xenotime-(Y) and composition of early florencite-(Ce) potentially support a genetic association between the HREE mineralization and the coeval unconformity-related U deposits of northern Australia Nevertheless, we also urge for caution in using xenotime-(Y) composition in isolation as an indicator of geological setting...
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Nd isotopic composition for monazite could be used to track the source, whereas Sr isotopic composition could possibly reflect some signature of the fluid source Th-U-Pb age determination of monazite may also record variable thermal or metasomatic disturbances, and careful geochronological interpretation should be brought forward...
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Mineralogy and
zone Table I shows the mineral composition of the different zon This study concerns apatite and xenotime from different zones in the pegmatite, with special emphasis on rare earth geochemistry and the genesis of REE-bearing inclusions in apatite Apatite Apatite is among the most abundant minor...
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The chemical composition of REE
The chemical composition of REE-Y-Th-U-rich accessory minerals in peraluminous granites of the Erzgebirge-Fichtelgebirge region, Germany Part II: Xenotime HANS-JU¨RGEN FO¨RSTER* GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany ABSTRACT Xenotime, from a geochemically heterogeneous series of mildly to strongly peralumi-...
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The distribution and composition of REE
This study provides a perspective on the distribution and composition of REE phosphate minerals in the region The elemental chemistry and mineralogy of sands and associated heavy-mineral assemblages from new and archived sediment samples across the coastal plains are examined, along with phase-specific compositions of monazite, xenotime and ....
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Xenotime R120080
Ni Y, Hughes J M, Mariano A N (1995) Crystal chemistry of the monazite and xenotime structures, American Mineralogist, 80, 21-26 Sabourdy G, Sagon J P, Pastier P (1997) La composition chimique du xénotime en Limousin, Massif Central, France, The Canadian Mineralogist, 35, 937-946...
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Understanding geologic processes with xenotime ,
Xenotime can be a complement, or indeed an alternative, to monazite and/or zircon in geochemical and geochronological studi To maximise the petrographic potential of xenotime, a complete understanding of its composition and relationship to rock-forming assemblages is essential...
